JQ-MPC锚喷高性能混凝土外加剂的试验研究

 通过对锚喷回弹、产尘和抗渗机理的研究，研制了具有低回弹、低产尘、高抗渗、高抗压等特点的锚喷混凝土外加剂（JQ-MPC）。实验研究数据表明：在具有较低掺量情况下符合国家一等品标准；胶砂对比试验结果表明（28d），其抗压和抗折强度比达到90%以上，混凝土抗渗等级在P30以上。通过在西北矿区的应用结果表明：掺入该外加剂后锚喷混凝土回弹率降至10%左右，粉尘浓度减低60%左右，后期（28d）抗压强度超过设计强度50%以上。

The Experimental Study of JQ-MPC Shotcrete Additive with High-performance

Through the research on the mechanism of rebound, dust product and impermeability in shotcrete, a kind of concrete additive was developed which can solve problems to a certain extent. Through the experimental study statistics indicate that lower dosage under the same conditions, the setting time can achieve the national superior product the standard. Through the plastic sand contrast test we can conclude that impermeability and resist compression can above 90% compared with neatslurry. The impermeability can reach to P30.Through the applied test at the tunnel in the xibei mining area, it has obvious effect on the shotcreting area, the rebound rate reduce to 10%, the dust density decreased for 60%, resist compression ability(28d)compare with design strength enhanced to 50%.